Trap the case where only one parameter is estimated and only one non-constant row is available in Jacobian: (1) do not use vnorm; (2) do not use advanced option.
(cherry picked from commit d9856879ea4d9a7d9e954cc9392d1f0e98634cda)
Merge pull request #553 from rattoma/master

Trap the case where only one parameter is estimated and only one non-con...